battery blues need advise

[iron and steel]

ok ma ma said the gas cart was too noisy so I sold the 1980 marathon and got a 09 ez go txt36 volt . I have had the cart approx. 2 years and have taken good care of the batteries. a few weeks ago the cart would only go about a mile or so before I noticed a decrees in power and torque. load tested the batts and found one that read weak I replaced said batt and now still the same alos now I have another that reads weak.(read ok prior to new batt. anyway I was looking for advise on proper trouble shooting this. attached are a few pics I built the back seat lift kit and brush guard my self.

replace the whole pack .. they will all fail soon
also remember when you put in a new cattery it will be drawn down to the older batteries not raise the old ones up

[iron and steel]

so even if all other batterys load test as good ? local dealer said I can replace the weak one please I need more info

[Volt_Ampere]

You want to do what Crash said and replace all of the batteries at one time. Your new ones won't last long when put into an old pack.

[teecro]

Originally Posted by iron and steel

so even if all other batterys load test as good ? local dealer said I can replace the weak one please I need more info

You've already seen that 2/3 of your pack are failing; at what point do you decide to replace the entire pack when you get to 1/2 way point or later? Old battery are just that old battery while they may still appear generally fine they simply just don't store the energy they once did; they fall faster and drag good batteries down with and prematurely weaken them both in use and more so while charging.

[iron and steel]

how do you initialize and new pack. ;I may have to get a set of cheaps for the local club to get me thru